Pin a Bug with One Test
Create a focused regression test from a real bug report.
A reset token can be used twice when two requests arrive close together. Regression test: reproduce the bug, pin the rule, patch the cause, keep the proof. The common shortcut is patching the visible line and relying on manual retesting, which forgets the concurrency lesson. State the rule A reset token may be consumed successfully once and must fail on the second use. The rule is smaller than the whole password-reset journey. Write the failing test Create a token, call the consume operation twice, assert success then rejection. The test fails because current behavior allows double use. Patch the cause…
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